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Search - Sentinal
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Kahn Sentinal 2 (for up to 4 x 600W Grow Lights)
Silent, vibration free, cooling and heating for grow rooms with up to 8 x 600W lights. DIY install, no engineer required. Indoor Unit Rated Volt: 220 – 240V Rated Frequency: 50HZ Noise: 54dB Weight (indoor): 14Kgs Max High Pressure: 2.8Mpa Max Low Pressure: 1.2Mpa Capacity: 21,000BTU/h (cooling) 22,300BTU/h (heating) Rated Current: 10.2A (cooling) 9.4A (heating) Max Current: 12.5A (cooling) 12.5A (heating) Rated Power Input: 1946W (cooling) 21..
£2,529.95
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SensiCal Grow
Advanced Nutrients SensiCal Grow supplies calcium (3 different sources including calcium chelate), magnesium, iron, manganese, zinc, copper, boron, molybdenum and cobalt. SensiCal Grow supplies these micronutrients in the exact ratios that dichotomous short day resin producing plants require. Heavy harvests need the support of strong stems. Just as we require calcium for strong, healthy bones, plants need calcium for similar reasons. Once deficient, it ca..
£24.95
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SensiCal Bloom
Plants need different amounts, ratios and types of nutrients during the bloom cycle, especially if they are producing flowers or fruit. That’s why we made SensiCal Bloom with three types of Calcium (including Calcium Chelate), along with Magnesium, Iron, Manganese, Zinc, Copper, Boron, Molybdenum and Cobalt, configured in a way that most benefits plants within a few weeks of harvest. Our product contains the precise synergistic balance of components so yo..
£24.95
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Wetting Agent
Wetting Agent reduces the surface tension of water. Add to any foliar feed to greatly assist in the penetration of the leaf tissue enhancing the uptake of the feed. Also used on dry compacted soil to allow water penetration to the root zone...
£6.95
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Trident pH-EC-CF-Temp Meter
Essential Trident - pH, EC/CF and Temp Meter - Highly accurate, professional all-in-one meter for easy nutrient control The all-in-one conductivity, pH and temperature meter is designed to make nutrient measurement quick and easy. It can be used as a stirrer and makes it easier to take readings in deep tanks. Accurate and rapid conductivity, pH and temperature measurement - Nutrient strength in EC, CF or PPM - Easy push button calibration - Auto turn-off..
£4.95
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pH Water and Drop Resistent Meter
The Essentials pH meter is truly the most rugged glass type pH tester around. It is water and drop resistant. Easy to use, just dip the sensor into test solution, stir and wait. The unit will deliver a stable reading in about 20 seconds...
£44.99
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EC Water and Drop Resistent Meter
The Essentials EC meter gives direct accurate readings of nutrient solution and is very helpful in mixing nutrient concentrate with water. All readings are automatically temperature compensated. Easy to use, just dip the sensor into test solution, stir and wait. The unit will deliver a stable reading in about 20 seconds...
£44.99
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EC Pro Waterproof and Drop Proof Meter
The ESSENTIALS pH Pro & EC Pro meters are professional quality, reliable and available with replacement probes. They have a large screen to view results and are very easy to use. They have screw calibration and come with a built in small screw driver. A feature that many customers have been asking us for. The meters have a lifespan of about 1 to 3 years depending on rate of sampling. (Units are good for 365 accurate tests.) These meters are some of t..
£4.95
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ph Up
ESSENTIALS pH Up 1L (50% Potassium Hydroxide) is a quality adjuster necessary to control the pH of nutrient solutions. Concentrated for the professional grower...
£5.95
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pH Up EasyControl (25% Potassium Hydroxide)
Due to concerns over safety, we have reformulated our pH adjusters to a 25% strength and called them 'EASYCONTROL 25'. This means that it is easier to use for novice growers as there is less chance of overdosing. There is a reduced price and it is safer to handle. Quality adjusters are necessary to control the pH of nutrient solutions...
£5.95
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pH Down
ESSENTIALS pH Down 1L (30% Phosphoric Acid) is a quality adjuster necessary to control the pH of nutrient solutions...
£5.95
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pH Down EasyControl (25% Phosphoric Acid)
Due to concerns over safety, we have reformulated our pH adjusters to a 25% strength and called them 'EASYCONTROL 25'. This means that it is easier to use for novice growers as there is less chance of overdosing. There is a reduced price and it is safer to handle. Quality adjusters are necessary to control the pH of nutrient solutions...
£3.99
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pH Buffer 4
Use ESSENTIALS Buffer 4 solutions to calibrate pH meters. All calibration solutions should be at room temperature for successful and accurate calibration...
£5.95
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pH Buffer 7
Use ESSENTIALS Buffer 7 solutions to calibrate pH meters. All calibration solutions should be at room temperature for successful and accurate calibration...
£5.95
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pHix-!t
ESSENTIALS pHix-!T 1L is a pH buffer. It is a blend of inorganic salts that fix and maintain the pH level of liquid to approximately 6.0 for up to 7-10 days. This product is best used when plants are established in a hydroponics system and growing vigorously...
£4.95
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Silicon+
Silicon+ produces a stronger plant by enhancing cell structure and also aids the development of root systems. The high pH of ESSENTIALS Silicon+ enables the product to be used as pH Up in hydroponic systems...
£2.95
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CF Standard Calibration 2.8mS
Use ESSENTIALS calibration solutions to calibrate EC/CF meters. CF Standard now makes it easier for you to calibrate as it is set to read CF28 at 20 degrees (room temperature)...
£5.95
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Digital 2 Way Thermometer/Min Max Meter
Nutrient temperature measurement is via a thin waterproof probe. The Min/Max memory records the highest and lowest temperature values. Can display in °F or °C...
£9.95
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Digital Min-Max Thermo Hygrometer
At the push of a button, it will display the highest and lowest values recorded since the unit was last reset. Can display in °F or °C...
£11.99
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CF Standard 2.8mS 30ml Calibration Sachet
Use ESSENTIALS calibration solutions to calibrate EC/CF meters. CF Standard now makes it easier for you to calibrate as it is set to read CF28 at 20 degrees (room temperature)...
£0.95
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Meter Store - 30ml (including meter sponge)
It's difficult to exaggerate the importance of maintenance and storage solutions. Expensive equipment is often utilised well below its full capabilities due to lack of proper maintenance of sensors. pH probes should always remain in Meter Store when not in use to prevent the probe from drying out. With Essentials Meter Store, keeping pH probes in tip top condition is no longer a problem. Includes probe foam to cut to the size of your meter cap to assist in..
£4.95
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pH Test Kit - Narrow Spectrum
Our ESSENTIALS pH Test Kit is good for 150 tests. At a rate of 3 tests per week, it will last one year. This makes it excellent value for money. Covers a pH range of 5.6-7.4 measuring in 0.2 increments...
£2.99
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pH Test Kit - Wide Spectrum
Our ESSENTIALS pH Test Kit is good for 150 tests. At a rate of 3 tests per week, it will last one year. This makes it excellent value for money. Covers a pH range of 4-8.5 measuring in 0.5 increments...
£2.99
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Replacement Probe for ESSENTIALS EC Pro Meter
Probes are replaceable so when your pH probe starts to go and your readings become erratic, don't go to the expense of buying a new meter, simply buy a replacement probe!..
£43.95
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Sentinel CS4 IMO Relay
The Sentinel CS4 Key Features: Grasslin precision timed Compact design Robust high quality powder coated metal enclosure Individually switched sockets with Illuminated switch Wall or grow tent pole mountable Manufactured in the UK More info coming soon.....
£82.95
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Sentinel CS8 GE Contactor
The Sentinel CS8 Key Features: Grasslin precision timed Compact design Robust high quality powder coated metal enclosure Individually switched sockets with Illuminated switch Wall or grow tent pole mountable Manufactured in the UK More info coming soon.....
£101.95
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Bio Essentials
Bio Essentials for all growing methods: hydroponics and soil An essential complement for all fertilizers Bio Essentials is a unique product: it is a comprehensive concentration of micro nutrients in a chelated form, plus essential sub micro particles and an organic buffer. It is used as a complement to the nutritive solution in soil and water culture, as well as in foliar spray. Micro and sub-micro nutrients are essential trace elements a plant needs, i..
£4.95
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Terpenez Essential Oil Intensifier
ZERO IMPACT on PPM's and pH of nutrient solution! Purposefully formulated as a 0-0-0 from certified organic inputs ensuring it won't conflict with your existing schedule or contaminate your crop. Terpenez represents a new class of horticultural products aimed at enhancing the aromatic experience associated with gardening. Many of the plants chosen for cultivation are selected based upon the value of their essential oils. With that knowledge, Terpenez has ..
£25.95
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Sentinel HD55 60L Per Day Dehumidifier
The Sentinel HD55 Dehumidifier is an excellent unit for crawlspaces, cellars and basements. It is robust, compact and versatile The main benefits for all the Sentinel range is that the machines can be controlled remotely. A controller plugs into the unit via a Cat 5 cable. The controller displays the temperature and humidity in the environment that is being controlled. The machine can be operated in two modes. Both the controller and the HD55 unit ha..
£1,510.25
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Sentinel HDi90 90L Per Day Dehumidifier
The Sentinel HD90 Basement Dehumidifier is designed specifically for crawl spaces and basements. Low noise level, great COP 2.88L/kWh(115V/60Hz) and huge capacity 90 PPD at AHAM condition. Sentinel HD90 Basement Dehumidifier supplements the air conditioning system in the summertime and maintains humidity levels balanced of the year. Moisture Removal Capacity (115V/60Hz): 90 Pints/Day@AHAM (80°F-60%), 198 Pints/Day@saturation (90°F，90%) Moisture Rem..
£108.95
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Essential Flora Extract 125ml
Essential Flora Extract is a highly soluble, concentrated (1/4 mL per gallon) and naturally steeped additive derived from land and sea plants. As with all Flying Skull products, great care has been taken to make sure that the chemistry behind Essential Flora Extract will work without causing any adverse chemical reaction with any other Flying Skull product. Essential Flora Extract has been successfully used in all hydroponic systems including Deep Water Cu..
£21.95
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Essentials Moisture METER - Digital
The Essentials Moisture METER is a necessity for the perfect grow! It allows you to easily measure the level of moisture in the ANY of the consumables you are drying, indicating whether the dried product is ready for storage. It is ideal for testing herbs that are drying, or plants such as tobacco or tea. Avoid Crop Wastage 9V Battery Included..
£33.95
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Eden Essentials Perlite
Providing a great addition to existing growing media for plants, Eden Essentials Perlite is used to improve drainage and aeration to grower’s soil or coco. By mixing this into soil or coco, growers can increase aeration to the roots and therefore improve root mass. 2-4mm perlite Improves aeration and drainage Suitable for hydroponic systems Strengthens root growth ..
£14.95
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Essentials CO2 Monitor
The Essentials CO₂ Monitor is a user-friendly indoor air quality monitor, which detects CO₂ levels using a Non-Dispersive Infrared (NDIR) spectroscopic sensor. Its large-format display shows the real-time CO₂ level, ambient temperature and relative humidity, along with a clock and a bar-chart indicating how CO₂ levels have changed over the previous 24 hours. It can be set to give a green / amber / red backlight to indicate normal / raised / high levels of ..
£132.95
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Sentinel HDi120 110v
Ideal for Crawlspaces – Ducting options available115v, 60hz, 7.8 Amps 1 year Parts and 5 year Compressor warranty Remote control equipped Has Condensate Pump – can pump up to 4.5m Head Size for up to 2600sq.ft Sound level <55DBA Functional Temp range 1 – 40 Deg C Dehumidification is 90L at 30degC and 80% RH AHAM (26Deg C / 60% RH) = 50L Dimensions 630w x 350h x 400d (mm) Weight 35.5kg..
£2,535.45
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AlorAir Remote Control Unit for Sentinel HD55, HDi90 and HDi120
This is the remote-control unit with back box and 5m of cat5 cable for the use with the Sentinel HD55, Sentinel HDi90 and Sentinel HDi120 dehumidifiers. The unit is to be wall mounted the cat 5 plugs into the back of the device so please leave enough room for this access/plugging in of the cable...
£147.95
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Wall Hanging Brackets for Sentinel HD55 (2 brackets)
Wall Mounting Brackets for the Sentinel HD55 and HDi90 Units. The arms slide out allowing for the 2 different sized machines to sit on it. Wall being used must be strong enough to support the unit, width between the brackets will vary depending on unit. For the HD55 2 brackets are required while for the HDi90 and Storm LGR we suggest 3 brackets for safety. Ideally set level between the 2 brackets however slight fall towards the sump end may help drainage f..
£54.95
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Wall Hanging Brackets for Sentinel HD55, HDi90, Storm LGR (3 brackets)
Wall Mounting Brackets for the Sentinel HD55 and HDi90 Units. The arms slide out allowing for the 2 different sized machines to sit on it. Wall being used must be strong enough to support the unit, width between the brackets will vary depending on unit. For the HD55 2 brackets are required while for the HDi90 and Storm LGR we suggest 3 brackets for safety. Ideally set level between the 2 brackets however slight fall towards the sump end may help drainage f..
£80.95
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Hanging System for the Sentinel HD55
Hanging System for the sentinel HD55 – Includes: 4 eyebolts, washers and double nuts, 4 eye-plates, 4 chains, 8 carbine hooks and 2 angles...
£131.95
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Hanging System for the Sentinel HDi90
Hanging System for the sentinel HDi90 – Includes: 4 eyebolts, washers and double nuts, 4 eye-plates, 4 chains, 8 carbine hooks and 2 angles...
£131.95
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Hanging System for the Sentinel HDi120
Hanging System for the sentinel HDi120 – Includes: 4 eyebolts, washers and double nuts, 4 eye-plates, 4 chains, 8 carbine hooks and 2 angles...
£131.95
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AlorAir Sentinel HD55 Carbon Filter
Carbon Filter for the Sentinel HD55 dehumidifier...
£108.95
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Essentials PLUS FLUSH
Essentials PLUS FLUSH is designed to clear unused nutrients from your plants, in the final week of flowering or 7-10 days of plant growth. Made from 100% natural minerals and plant extracts, Flush is very effective when the taste and texture of your crop is important. Can also be used to correct the results of accidental over-fertilisation, suitable for all systems and substrates. Features: Clears nutrients from plants at the end of flowering C..
£8.95
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Essentials PLUS NO STRESS
Essentials PLUS NO STRESS is designed to improve plant health and aid stress tolerance. Whether your plant is being affected by heat, drought, cold or pests this additive will provide support. Used alongside regular nutrients, NO STRESS helps your plant manage environmental stress, cope with reduced amounts of water but still produce great yields. NO STRESS contains a natural source of carbon, potassium, nitrogen, fulvic acids, magnesium, sulphate and ca..
£30.95
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Essentials PLUS CALMAG
Essentials PLUS CALMAG is a calcium and magnesium supplement with added iron and nitrogen It is an essential additive for plants during prolonged vegetative growth or when deficiency is observed. Calcium is important for strong cell walls and root development, plant processes and photosynthesis. Magnesium is important for plant growth and health and is a building block for chlorophyll. Iron acts as an enzyme cofactor and is important for photosynthesis. A ..
£8.95
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Essentials PLUS FULVIC
Essentials PLUS FULVIC is a plant growth supplement containing fulvic acids derived from organic matter in soil. Used throughout a plant’s life cycle, it enhances nutrient uptake and transport, maximising the effects of other nutrients and additives on your plants. Applied as a foliar spray, FULVIC increases the permeability of the plants’ membranes and thus increases oxygen uptake and photosynthetic rate and improves the transport of nutrients. Added to t..
£26.99
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Essentials PLUS GREEN UP
Essentials PLUS GREEN UP is a calcium-rich foliar feed containing nitrogen and fulvic acids. Calcium has poor mobility within plants; GREEN UP supplies calcium where it is needed and fulvic acid allows for its easy absorption. Calcium aids vigorous growth, allowing plants to build strong cell walls which keep the plants healthy which in turn assists their resistance to pests, disease and drought. GREEN UP also contains nitrogen which assists the producti..
£7.95
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Essentials PLUS OXY 12% 5L
Essentials PLUS OXY 12% is an additive which increases the oxygen content of your nutrient solution and maintains system cleanliness. Also useful as a preventative against pythium, or to sanitise hydroponic systems or growing media. Features: Increases the oxygen content of nutrient solutions Protects against pythium Sanitises hydroponic systems or growing media Technical Specifications: Contains Hydrogen Peroxide H₂O₂ - 12% U..
£33.95
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Essentials PLUS SILICON
Essentials PLUS SILICON is a highly concentrated and easily soluble additive which provides potassium silicate, in the best form of silicon for plants to uptake. Highly beneficial to plants, silicon strengthens plant cell walls to produce stronger, bigger plants with thicker roots. Strong cell walls give better resistance to drought stress and help protect plants against attack by insects and pathogens. Silicon also boosts CO2 absorption, chlorophyll produ..
£3.95
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Essentials PLUS PK 13/14
Essentials PLUS PK 13/14 is a highly concentrated PK additive intended for use throughout the week of peak flowering. With high levels of phosphorus and potassium at the ideal ratio and in a form ideally suited for plants to assimilate, PK 13/14 gives plants an extra push to produce flowers and fruits of exceptional size and quality. Suitable for use in all growing systems and media, alongside main nutrients. Features: Enhances yield and quality of..
£6.95
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Essentials Illuminated Microscope (100x)
This powerful microscope allows the grower to easily identify plant species, as well as pests and diseases not visible to the naked eye, allowing faster remedial reactions and minimising potential damage to your plants. Complete with high intensity lighting providing targeted illumination. The compact and durable design allow easy storage in a busy grow room environment. Allows growers to quickly and easily identify pests, diseases or plant specie..
£13.99
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Essentials Illuminated Microscope (60-100x)
This powerful microscope allows the grower to easily identify plant species, as well as pests and diseases not visible to the naked eye, allowing faster remedial reactions and minimising potential damage to your plants. Complete with high intensity lighting providing targeted illumination. The compact and durable design allow easy storage in a busy grow room environment. Allows growers to quickly and easily identify pests, diseases or plant specie..
£15.95
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Essentials LAB 30% pH-
Essentials LAB 30% pH- is an acid solution (30% phosphoric acid) which can be used in small, controlled doses to lower the pH (increase acidity) of nutrient solutions. Mix thoroughly and measure with a calibrated pH meter to attain the desired pH reading. Ideal for adjusting large volumes of nutrient solution. Concentrated acid solution Can adjust the pH of large volumes of nutrient solution Technical Specifications: 30% phosphoric acid..
£6.95
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Essentials LAB Buffer 4
Essentials LAB Buffer 4 is an ideal solution for calibration of pH meters at pH4. Regular calibration will keep your pH meter reading accurately. Highly accurate pH4 solution Ensures that your pH meter is reading correctly Technical Specifications: Acidity level: pH4 FAQs: Q: When should I calibrate my pH meter, and why do I need to do it? A: The performance of a pH electrode or pH meter will change with time due to aging beca..
£4.95
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Essentials LAB Buffer 7
Essentials LAB Buffer 7 is an ideal solution for calibration of pH meters at pH7. Regular calibration will keep your pH meter reading accurately. Highly accurate pH7 solution Ensures that your pH meter is reading correctly Technical Specifications: Acidity level: pH7 (Neutral) FAQs: Q: When should I calibrate my pH meter, and why do I need to do it? A: The performance of a pH electrode or pH meter will change with time due to aging ..
£4.95
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Essentials LAB EC Meter Calibration Solution 250ml
Essentials LAB EC Meter Calibration Solution is intended for use in calibrating EC meters to CF 28 – EC 2.80 – PPM 1820. Regular calibration will keep your EC Meter reading accurately. Highly accurate calibration solution Ensures that your EC Meter is reading correctly Technical Specifications: Potassium Chloride solution Electrical Conductivity: 2.8ms/cm @20°C PH 4 - 5 FAQs: Q: When should I calibrate my EC meter, an..
£4.95
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Essentials LAB pH Test Indicator - Wide Spectrum
The Essentials LAB pH test kit gives a quick comparative reading of the pH of your nutrient solution. The kit gives a quick and cost-efficient measure and is adequate for over 100 readings. It is also ideal as a back-up solution in case your pH meter should stop working. The wide spectrum test kit measures between pH4.0 and pH8.5 in increments of 0.5. Simple to use Cost effective An ideal back-up for your pH Meter Technical Specifications..
£4.95
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Essentials LAB pH+
Essentials LAB pH+ is a concentrated alkaline solution (50% potassium hydroxide) which can be used in small, controlled doses to raise the pH (decrease acidity) of nutrient solutions. Mix thoroughly and measure with a calibrated pH meter to attain the desired pH reading. Ideal for adjusting large volumes of nutrient solution. Highly concentrated Can adjust the pH of large volumes of nutrient solution Technical Specifications: 50% potassium..
£6.95
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Sealz Vacuum Sealer Essentials
Sealz is a revolutionary new vacuum sealer that features a battery-less design; with this Sealz Vacuum Sealer Essentials kit you'll get the Sealz phone adapter vacuum pump powered by USB-C and Lightning cable. Sealz Vacuum Sealer Essentials includes 3 different bags with the largest capable of holding up to 112g, the medium up to 35g and the smallest up to 14g. Sealz Vaccum Sealer bags feature 7 layers of PE plastic to maximise odour control, they're als..
£41.95
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Eden Essentials Clay Pebbles
As well as being used for drainage and aeration, Eden Essentials Clay Pebbles can also be used as a stand-alone growing media in hydroponic systems. Higher Nutrient Uptake Eden Essentials Clay Pebbles help your growing medium get more air and therefore encourage faster and stronger roots which can uptake more nutrients. Features 10-20 mm clay pebbles Encourages faster root growth Suitable for hydroponic systems. Great water a..
£8.95
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Ecothrive Trace - Essential Micronutrients for Thriving Plants
Small Doses, Big Difference Ecothrive Trace corrects micronutrient deficiencies and unlocks your plants' full potential. Compatible with soil, coco or hydroponics, this premium trace element supplement contains optimal levels of iron, manganese, boron, zinc, copper, and molybdenum, all naturally chelated using a powerful plant extract. Approved by the Soil Association for organic cultivation, Ecothrive Trace promotes vigorous, fast-growing plants and trul..
£8.99
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Sea Essentials
Hy-Gen SEA ESSENTIALS is formulated using a unique blend of sea plants including kelp, seaweed and seagrass. Each of these has its own unique plant health promoting properties, micro nutrient content and flower promoting properties. High levels of potassium and trace elements is an additional benefit since it provides plants with a natural source beneficial to flower and fruit development.FeaturesImproves yield & flavour qualityImproves root ..
£29.99
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